"Worst feeling in my entire life," said Beggs, a junior at Euless Trinity.

It started from the time he was three years old, when his mother, Angela McNew, tried to put him in a purple dress. Beggs threw it back.

"I don't wear dresses anymore," he said.

But for Beggs, it wasn't until he was in fifth or sixth grade that he realized he was different. Beggs dressed like a boy, acted like a boy, and considered himself one of the guys. But despite being a prolific writer since he was young and a member of the gifted and talented classes, he didn't know how to explain how he felt.

"It was terrible," Beggs said. "I felt so unhappy. I just couldn't figure out why I was unhappy. ... It was hard to explain to people."

One day, Angela picked him up from seventh grade and said they were going to watch something. She wanted him to be honest about how he felt afterward. It was a Katie Couric special on transgender youth.

Dale Hansen: Mack Beggs 'needs our support ... not a group of old men in Austin telling him who to wrestle'

"I was like, 'Wow, that makes a lot more sense,'" Beggs said.

In the years since then, Beggs has embraced who he is. He's also embraced wrestling, a sport he's grown to love over the last three years, even as UIL rules keep him from competing in the gender he identifies as.

Beggs became a media sensation over the last two weeks as he went on to win the girls 110-pound state championship last weekend. As a lawsuit continues to try to prevent him from wrestling against girls next season because of his use of testosterone, Beggs reiterated Tuesday that he definitely wants to wrestle boys and looks forward to doing so this summer in competitions outside of UIL rules.

Beggs also opened up about his past. He said he continued to struggle with gender dysphoria from seventh to ninth grade and it took a toll mentally. In seventh grade, he spent time from August to November going to a mental health facility in Fort Worth. Eventually he came out of his depression.

"I was so glad I got out of that state," Beggs said.

Afterward, Beggs gave himself pep talks, asking if he wanted to be like he was before.

"I'd be like, 'No I don't want to be like that again,'" Beggs said. "I don't want to be a lost cause."

Staff Photographer

Mack Beggs (hands up) state wrestling champion and 17-year-old transgender student from Euless Trinity during an interview on Skype with his friend, D'Shaylyn August, 17, brother, Harley McNew, 13, and mother Angela McNew, at his home in Hurst, Texas, on February 28, 2017. (Nathan Hunsinger/The Dallas Morning News)

In sixth grade, Beggs came out to his close friends. Some understood, others didn't and stopped talking to him. But Beggs brushed it off and said he had only a couple of bullies at school. Those were dealt with quickly as a counselor or principal got involved.

When he reached high school, he watched the school go wild as a wrestler made it to state. He decided he wanted to do that as well. Eventually, a kid who competed in everything from softball to track and field became singularly focused on wrestling.

Around the same time, Beggs had a hormone blocker implanted in the inside of his left arm. While the device stopped estrogen, it also suppressed his testosterone. Early morning wrestling practices and cutting weight took an even bigger toll on his body. Some days he felt like he couldn't do it. But he wanted to go to state.

So when he faced the issue of either wrestling girls or not wrestling at all, he chose to compete. He said his training is why he won and went 57-0 this season -- not his use of testosterone. In fact, while his voice has deepened and he's gotten more leg and facial hair, he's actually disappointed in how little his body has changed.

"This is a bigger, more complex situation," Beggs said. "There's so many variables. People just don't understand that."

As Beggs talked Tuesday, he expressed bewilderment at the attention he's received.

"This is nuts," he said at one point.

He also expressed excitement at having a chance to represent the wrestling and the LGBT community. He wants to help those who find themselves in a similar situation he was in, those who've felt like a lost cause, those still searching for who they are.

More on Mack Beggs

Vernon Bryant/Staff Photographer

Euless Trinity's Mack Beggs is announced as the winner of the state championship title in the girls Class 6A girls 110 weight class during the UIL Wrestling State Tournament at Berry Center in Cypress on Saturday, February 25, 2017. Beggs, a 17-year-old transgender wrestler from Euless Trinity making a transition from female to male, defeated Katy Morton Ranch's Chelsea Sanchez. (Vernon Bryant/The Dallas Morning News)